85845091 has 4 divisors (see below), whose sum is σ = 86371912. Its totient is φ = 85318272.

The previous prime is 85845079. The next prime is 85845101. The reversal of 85845091 is 19054858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85845091 - 2⁷ = 85844963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85845791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263166 + ... + 263491.

It is an arithmetic number, because the mean of its divisors is an integer number (21592978).

Almost surely, 2^85845091 is an apocalyptic number.

85845091 is a deficient number, since it is larger than the sum of its proper divisors (526821).

85845091 is a wasteful number, since it uses less digits than its factorization.

85845091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526820.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 85845091 is about 9265.2625974659. The cubic root of 85845091 is about 441.1353101758.

The spelling of 85845091 in words is "eighty-five million, eight hundred forty-five thousand, ninety-one".